Add a MediaPlayerWrapper for Google Play Music

/*

 * Copyright 2017 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.android.bluetooth.avrcp;

import android.media.MediaMetadata;

import android.media.session.MediaSession;

import android.util.Log;

/**

 * Google Play Music hides some of the metadata behind a specific key in the Extras of the

 * MediaDescription in the MediaSession.QueueItem. This class exists to provide alternate

 * methods to allow Google Play Music to match the default behaviour of MediaPlayerWrapper.

 */

class GPMWrapper extends MediaPlayerWrapper {

    private static final String TAG = "NewAvrcpGPMWrapper";

    private static final boolean DEBUG = true;

    private static final String GPM_KEY = "com.google.android.music.mediasession.music_metadata";

    // Google Play Music should always be browsable.

    @Override

    boolean isBrowsable() {

        return true;

    }

    @Override

    boolean isMetadataSynced() {

        // Check if currentPlayingQueueId is in the queue

        MediaSession.QueueItem currItem = null;

        for (MediaSession.QueueItem item : getQueue()) {

            // The item exists in the current queue

            if (item.getQueueId() == getActiveQueueID()) {

                currItem = item;

                break;

            }

        }

        // Check if current playing song in queue matches current Metadata

        if (currItem == null

                || !queueItemToMetadata(currItem).getDescription()

                        .equals(getMetadata().getDescription())) {

            if (DEBUG) {

                Log.d(TAG, "Metadata currently out of sync for Google Play Music");

                Log.d(TAG, "  └ Current queueItem: " + currItem);

                Log.d(TAG, "  └ Current metadata : " + getMetadata().getDescription());

            }

            return false;

        }

        return true;

    }

    @Override

    MediaMetadata queueItemToMetadata(MediaSession.QueueItem item) {

        MediaMetadata gpmdata = (MediaMetadata) item.getDescription().getExtras().get(GPM_KEY);

        MediaMetadata.Builder newMetadata = new MediaMetadata.Builder(gpmdata);

        newMetadata.putString(MediaMetadata.METADATA_KEY_TITLE,

                item.getDescription().getTitle().toString());

        return newMetadata.build();

    }

}

        }

        MediaPlayerWrapper newWrapper;

        if (controller.getPackageName().equals("com.google.android.music")) {

            Log.v(TAG, "Creating compatibility wrapper for Google Play Music");

            newWrapper = new GPMWrapper();

        } else {

            newWrapper = new MediaPlayerWrapper();

        }

        newWrapper.mMediaController = controller;

        newWrapper.mPackageName = controller.getPackageName();